drivers/video/msm/mddi_client_dummy.c

   1 /* drivers/video/msm_fb/mddi_client_dummy.c
   2  *
   3  * Support for "dummy" mddi client devices which require no
   4  * special initialization code.
   5  *
   6  * Copyright (C) 2007 Google Incorporated
   7  *
   8  * This software is licensed under the terms of the GNU General Public
   9  * License version 2, as published by the Free Software Foundation, and
  10  * may be copied, distributed, and modified under those terms.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  */
  17
  18 #include <linux/module.h>
  19 #include <linux/kernel.h>
  20 #include <linux/platform_device.h>
  21
  22 #include <mach/msm_fb.h>
  23
  24 struct panel_info {
  25         struct platform_device pdev;
  26         struct msm_panel_data panel_data;
  27 };
  28
  29 static int mddi_dummy_suspend(struct msm_panel_data *panel_data)
  30 {
  31         return 0;
  32 }
  33
  34 static int mddi_dummy_resume(struct msm_panel_data *panel_data)
  35 {
  36         return 0;
  37 }
  38
  39 static int mddi_dummy_blank(struct msm_panel_data *panel_data)
  40 {
  41         return 0;
  42 }
  43
  44 static int mddi_dummy_unblank(struct msm_panel_data *panel_data)
  45 {
  46         return 0;
  47 }
  48
  49 static int mddi_dummy_probe(struct platform_device *pdev)
  50 {
  51         struct msm_mddi_client_data *client_data = pdev->dev.platform_data;
  52         struct panel_info *panel =
  53                 kzalloc(sizeof(struct panel_info), GFP_KERNEL);
  54         int ret;
  55         if (!panel)
  56                 return -ENOMEM;
  57         platform_set_drvdata(pdev, panel);
  58         panel->panel_data.suspend = mddi_dummy_suspend;
  59         panel->panel_data.resume = mddi_dummy_resume;
  60         panel->panel_data.blank = mddi_dummy_blank;
  61         panel->panel_data.unblank = mddi_dummy_unblank;
  62         panel->panel_data.caps = MSMFB_CAP_PARTIAL_UPDATES;
  63         panel->pdev.name = "msm_panel";
  64         panel->pdev.id = pdev->id;
  65         platform_device_add_resources(&panel->pdev,
  66                                       client_data->fb_resource, 1);
  67         panel->panel_data.fb_data = client_data->private_client_data;
  68         panel->pdev.dev.platform_data = &panel->panel_data;
  69         ret = platform_device_register(&panel->pdev);
  70         if (ret) {
  71                 kfree(panel);
  72                 return ret;
  73         }
  74         return 0;
  75 }
  76
  77 static int mddi_dummy_remove(struct platform_device *pdev)
  78 {
  79         struct panel_info *panel = platform_get_drvdata(pdev);
  80         kfree(panel);
  81         return 0;
  82 }
  83
  84 static struct platform_driver mddi_client_dummy = {
  85         .probe = mddi_dummy_probe,
  86         .remove = mddi_dummy_remove,
  87         .driver = { .name = "mddi_c_dummy" },
  88 };
  89
  90 static int __init mddi_client_dummy_init(void)
  91 {
  92         platform_driver_register(&mddi_client_dummy);
  93         return 0;
  94 }
  95
  96 module_init(mddi_client_dummy_init);
  97